Chess · Worth knowing

After Round 5 of the 2026 Sinquefield Cup, Wesley So leads with 3½ points, ahead of a four-way tie at 3 points between Vincent Keymer, Maxime Vachier-Lagrave, Praggnanandhaa Rameshbabu, and Fabiano Caruana. The tournament features a strong field of ten players with ratings ranging from 2701 to 2792, playing classical time controls.

ChessBase Magazine #232 features coverage of the Sigeman Tournament in Malmö with Magnus Carlsen's return to classical chess, including annotations by his second Peter Heine Nielsen and Andy Woodward that reveal the strategic reasoning behind moves. The issue's opening section covers diverse systems including the London System, Nimzo-Indian, Sicilian variations, English, Czech, Anti-Najdorf, French Advance, Petroff, Grünfeld, and Catalan, presented through high-quality tournament games with practical applications. A notable feature is the Sindarov Special, tracing 22 games of one of chess's most exciting young players to show their development step by step. The magazine includes endgame instruction from Karsten Müller and Leon Mendonca on essential rules, columns by IM Reeh on tactics training and GM Rogozenco on endgames, and analyses of recent games like Suyarov–Svane and the European Championship match Ljepic–Guijarro, all designed to provide actionable training material for competitive players.

The article surveys recent scientific research on chess skill development, covering multiple dimensions relevant to competitive chess. It examines how elite chess combines automatic pattern recognition with conscious strategic thought, noting that unconscious pattern storage enables rapid move generation while slow games require deliberate planning. The research discusses limitations of Elo ratings as a skill measure and presents evidence that while apparent rating inflation exists at the top level, computer analysis suggests players today are genuinely stronger rather than ratings being inflated. The article details learning curves showing typical rapid early improvement that levels off over time, and tracks how the number of games required to achieve IM and GM titles has steadily increased. It also covers sex differences in top-level play, with a persistent 250-point rating gap between top male and female players that hasn't converged despite predictions, alongside analysis suggesting natural talent plays a significant role in reaching grandmaster level, though perhaps less so for intermediate master titles.